Weird Grinding / Vibration

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Feb 14, 2013 | 10:13 AM

scottf4444

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From: Temecula, CA

Weird Grinding / Vibration

I tried this over in the 6.0 forum but didn't get anything so hopefully someone here will have an idea...

After driving for about 15 minutes, once it is warmed up, at acceleration & low rpm's, there is a vibration, mild grinding noise. Once you get to mid-range and up on the rpm's, it goes away. When cruising down the highway at normal speeds and a consistant rpm...no noise. Idling at, and taking off from a stop light, I get the noise. The longer it is driven, the more noticeable the noise is. Possible torque converter??? Thanks!

Feb 14, 2013 | 10:48 AM

EpikExcursion

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From: The 405

Does it only make the grinding or vibration sound when you let off the gas while driving down the highway by chance?

Feb 14, 2013 | 10:51 AM

volthause

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From: Raleigh, NC

This kind of noise?

Feb 14, 2013 | 11:36 AM

EXv10

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From: Mt. Shasta California

Get a piece of hose, climb under and around, put it to your ear. Also take the inspection plate off the converter housing and take a peek.

Feb 15, 2013 | 12:28 PM

scottf4444

Thread Starter

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Joined: Oct 2006

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From: Temecula, CA

Thanks for the replies.

Quote:

Originally Posted by volthause

This kind of noise?

WHAT IS THIS NOISE 7.3 SUPER DUTY - YouTube

Pretty much dead on to what I hear. What is that?

Feb 15, 2013 | 01:12 PM

EXv10

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Joined: Mar 2009

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From: Mt. Shasta California

I see your bottom cover is already off. Check around with that hose, hold it to the exhaust cat also, plus you can tape it to a funnel for a little broader noise range.

Feb 15, 2013 | 02:45 PM

volthause

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Joined: Jan 2012

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From: Raleigh, NC

Quote:

Originally Posted by scottf4444

Thanks for the replies.

Pretty much dead on to what I hear. What is that?

That is a flex plate cracking / failing. It's about $145 piece on the 7.3, so I would think it's about the same for 6.0. You can get more expensive / billet ones if you search around, they are more expensive though.

Transmission needs to be pulled to replace, but beyond that I don't know since I have not personally replaced one.

Good luck.

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Feb 15, 2013 | 05:56 PM

EXv10

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Joined: Mar 2009

Posts: 11,798

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From: Mt. Shasta California

Wow, that could have done a LOT of damage. Pull the trans with the converter, unbolt what's left of the plate, and bolt a new one in. Hopefully the starter will sound the same and also; no balancing is needed.